The mostpredominantecosystemsin the park arethetropical dry forestand alagoonthat has its originin a crater.About 140,000tourists visitthe parkeach year,according to official statistics, the mainattraction is theedge of the activecrater of the volcano, which is called« Santiago ».TheMasayais one ofseven activevolcanoesin Nicaragua since1520and has recordedat least 18different activities, includingvolcanic eruptionsof1772and 1820, according to official information.

The latestreleaseof Ineter:

At10:40 p.m.yesterday,an earthquakein the calderaof theMasayavolcano,with a magnitude of3.0degrees,reported asbeingfelt byresidents ofcommunitiessurroundingthe volcanowas registered.Theseismicamplitudein real time (RSAM) hasmoderate to highvaluesbetween 100 and620units.These highRSAMvaluesare related to thehigh energyvolcanictremordue to themagmamovement in thecraterSantiago.Thelava lakein the twomouthsof the floorof the craterSantiagois reportedvisible.The mouthin thenortheastern partof the craterwas reopened, possiblybecause of theearthquakesthat took placelast night.In the southernpart of the craterSantiago, there isthe formation of athirdmouth, whichwill prolongthe activityin the coming days.It is very likelythatthelavawill also be visibleinthethirdmouth.

Sources :La Estrelle , Ineter.

Photos :Cesar Perez , Christian Heeb .

Momotombo, Nicaragua :

A newexplosion ofMomotombotook placeat dawnon Saturday.People who livein communitiesnear the volcanoreported hearinga loud crashwith smokefumes.At this time hewas not registeredashemissionsorearthquakesfelt inneighboring communities.Members ofCOMUPREDmovedto the site tocheck andaccompany families.The volcanobegan itseruptive processsince December lastyear andthis is a partofphasesof the natural phenomenon.

The early hours ofSaturday, theMomotombovolcanobegan toexpelincandescentmaterials, according tothe images ofsurveillance camerasofINETER.The expulsiontook placeat about3h45,so theauthorities remainedvigilantfor the activity of the volcano.According to residentsof the regionat the time ofhigh activity, explosionsbefore the startof the emissions of lavashave been heard.

Shishaldin, Alaska :

Nearly continuous, low-level seismic tremor, as well as small discrete events, continued during the past 24 hours at Shishaldin, and are present at levels above background for the volcano. No activity was observed in satellite images.

Shishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.

Source :AVO

Photo :Werner, Cindy

Kilauea , Hawai :

Activity Summary:
Eruptive activity continues at Kilauea Volcano’s summit and East Rift Zone. Seismicity and deformation rates throughout the volcano remain at background levels. Scattered lava flow activity continues on the June 27th lava flow field within about 6 km (4 mi) northeast of Pu’u ‘O’o. These flows currently pose no threat to nearby communities.

A view of the western portion of Pu’u ‘O’o Crater, with the small circular pit that contains the active lava pond. HVO’s cameras are on the rim at the right side of the photograph.

Summit Observations:
The lava lake remains active within the Halema’uma’u Overlook crater. The lake surface height fluctuated slightly over the past day during spattering phases and was approximately 38 m (125 ft) below the crater rim this morning. No significant change in tilt was observed at summit tiltmeters over the past day. Seismicity is within normal, background rates with tremor fluctuations associated with lava lake spattering. The summit sulfur dioxide emission rate averaged 5,300 metric tons/day on January 21 and 22.

Pu’u ‘O’o Observations:
Webcam images over the past 24 hours show persistent glow at long-term sources within the crater and high on the northeast flank of the cone. Seismic activity remains low at Pu’u ‘O’o. A tiltmeter on the cone recorded no significant change in tilt over the past day. The sulfur dioxide emission rate from all East Rift Zone vents was about 220 metric tons/day when it was last measured on January 21.

June 27th Lava Flow Observations:
Webcam images show continued surface flow activity on the June 27th flow field, with smoke plumes where lava is igniting forest. The active flows are within about 6 km (4 mi) northeast of Pu’u ‘O’o and are not currently threatening any nearby communities.